Bag manufacture



Nov. 7, 1939.

BAG MANUFACTURE Filed July 17, 1937 T. M. A'VERY 2,179.464 Q 17 Sheets-Sheet 1 I WILEY I112 Nov. 7, 1939. 'r. M. AVERY BAG MANUFACTURE Filed July 17, 1937 17 Sheets-Sheet 2 Nov. 7, 1939. T. M. AVERY 2,179,464

BAG MANUFACTURE Filed July 17, 1937 17 Sheets-Sheet 3 v 4 M I W //7 I 1 Mi avwcm Tom frag M/fver T M. AVERY BAG MANUFACTURE Nov. 7, 1939.

Filed July 17, 1957 17 Sheets-Sheet 4 WNN T. M. AVERY BAG MANUFACTURE Nov. 7, 1939.

Filed July 17, 1937 17 Sheets-Sheet 5 Nov. 7, 1939. T. M. AVERY 2.179.464

BAG MANUFACTURE Filed July 1'7, 1937 17 Sheets-Sheet 5 GUM/14.0115

T. M. AVERY BAG MANUFACTURE Nov. 7, 1939.

Filed July 17, 1937 17 Sheets-Sheet 7 all III/ a Nov. 7, 1939. T. M. AVERY BAG MANUFACTURE Filed July 17', 1957 17 'Sheets-She et s will 0 w fruefludrr Nov. 7, 1939. "r. M. AVERY ,1 6

BAG MANUFACTURE Filed July 17, 1937 17 Sheets-Sheet 9 7x gJE. W w M w W J W w 4 W 1* G 99 97 3 9% r a; u;

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Filed July 17, 1957 17 Sheets-Sheet 10 Qwuww Nov. 7, 1939. AVERY 2,179.464

' BAG MANUFACTURE Filed July 17, 1957 17 Sheetsheet 11 s ZE/ Zwejii. Avery T. M. AVERY BAG MANUFACTURE Nov. 7, 1939.

Filed July 17, 1957 17 Sheets-Sheet 12 T. M. AVERY BAG MANUFACTURE Nov. 7, 1939.

Filed July 17, 1957 17 Sheets-Sheet 15 my 6 V a A 5 5 f j i a M Z i w W w T 2 i w y Z 5 z a i 5 My T. M. AVERY BAG MANUFACTURE Nov. 7, 1939.

Filed July 17, 1937 17 Sheets-Sheet 14 JI WWM True 1%. Away GUM/MM; g

Nov. 7, 1939. T. AVERY 2.179.464

BAG MANUFACTURE Filed July 17, 1937 17 Sheets-Sheet l5 1 .41 2/7 E r47 aww W 3Z9 1/6 flue 1% Aye/y NOV. 7, 1939. -r AVERY 2,179,464

BAG MANUFACTURE Filed July 17, 1937 17 Sheets-Sheet 16 Z if v 3 v 2.96 Z97 Gunman 5 T. M. AVERY BAG MANUFACTURE Nov. 7, 1939.

Filed July 17, 1937 17 Sheets-Sheet 17 E fluefldm r y. M; +13% Patented Nov. 7, 1939 BAG MANUFACTURE True M. Avery, Glens Falls, N. Y., assignor to Union Bag & Paper Corporation, Hudson Falls, N. W a corporation of New Jersey Application July 17, 1937, Serial No. 154,296

Claims.

- The present invention relates to improvements in the manufacture of paper bags according to which a webof paper fed from a roll or the like is provided along one edge with a line of paste after which the web is fed past a former over which it is folded to form a bag tube having a longitudinal seam, the bag tube, during its further advance, being severed into bag lengths the leading ends of which are slit longitudinally to form bottom flaps and then opened into substantially a diamond fold to receive paste, after which the portion of the bag length thus posted is folded to form a bag bottom of the satchel type.

One of the primary objects of the present invention is to provide a novel and improved method and means for applying paste or other adhesive to those portions of the web which, in the completed bags, will be located at the ends of 20 the slits, so that when the bottom folds are made to close the bag bottom, the bottom iiaps will be pasted together at the ends of the slits, thereby rendering the bottom of the bag sift-proof and also reeniorcing the bag bottom against tearing or splitting beyond the ends of the slits.

Another object of the invention is to provide novel and improved means, in a machine for making bags of this class, for cutting the travelling web at points adjacent to the lines on which the bag tube is subsequently severed, to

form a thumb hole at the mouth of the completed bag which provides a lip to facilitate the opening of the bag, the thumb hole cutting means being adjustable to accommodate it to diflerent speeds of travel of the web accordin to difierent bag lengths.

Another object is to provide simple and effective means for cutting off the bag tube to form the bag lengths, the tube being cut ofi on lines which join the previously made out for the thumb hole, thereby completing the cut-off without severing the tab formed in making the cut for the thumb hole.

Another object of the invention is to provide, novel and improved means for mounting the ionvide improved means for slitting and opening the bottom flaps to receive the paste and for closing such flaps, and for delivering the finished bags from the machine, and to provide other improvements as will hereinafter appear.

To these and other ends, the invention consists in certain improvements and combinations and arrangements of parts all as will be hereinafter described, the features of novelty being pointed out more particularly in the claims at the end of this specification.

In the accompanying drawings:

Figures 1 and 1 collectively show in side elevation a bagmachine constructed in accordance with the present invention;

Figure 2 is a vertical section, on an enlarged scale, taken through the portion of the machine shown in Fig. 1

Figure 3 is an elevation of the portion of the machine shown in Fig. 1 but viewed from the opposite side of the machine;

Figure 4 is a vertical section, on an enlarged scale, taken through the portionof the machine shown in Fig. 1;

Figure 5 is a transverse vertical section taken on the line 55 in Fig. 1;

Figure 6 is a horizontal section, on an enlarged scale, taken on the line 6-6 in Fig, 2;

Figure 7 is a detail vertical section, taken on the line 1-! in Fig. 6; 30

Figure 8 is an end elevation on an enlarged scale, of a portion of the machine shown in Fig. 2 as viewed from the right, showing the longitudinal seam paster; I

Figure 9 is a top plan view, on an enlarged scale, of'a portion of the longitudinal seam paster as shown in Fig. 8;

Figure 10 is an end elevation of the longitudinal seam paster shown in Fig. 9, as viewed from .i the left in that figure;

Figure 11 is a vertical section taken on the line ii-H in Fig. 9;

Figure 12 is a section, on an enlarged scale, taken on the line I2-l2 in Fig. 1, showing th thumb hole cutter; I

ure 13 is a horizontal section, on an enlarged scale, taken on the line l3-i3 in Fig. 1, showing the paste spot applying mechanism; Figure 14 is a vertical section taken on the line i4--l4 in Fig. 13; 50

Figure 15 is a detail perspective view of one of the paste spot applying members; v

Figure 16 is a detail view, on an enlarged scale, of the driving gears for the thumb hole cutter as viewed from the right inFigQlZ;

Figure 1'7 is a vertical section on an enlarged scale, taken on the line I'I-I'I in Fig. 12, showing one of the adjusting screws for the thumb hole cutter;

Figure 18 is a view in elevation and on an enlarged scale, of the thumb hole cutter;

Figure 19 is a section taken on the line I 9-i 9 in Fig. 18;

Figure 20 is a section taken on the line 2lI-2II in Fi 19;

Figure 21 is a view similar to Fig. 19 but showing a modified form of thumb hole cutter;'

' Figure 22 is a top plan of the table of the machine showing the folders for folding the web into a tube;

Figure 23 is a detail view of portions of the corrugating rolls;

Figure 23 is a vertical section through the bearings and adjusting and controlling means at one end of the corrugating rolls;

Figure 24 is a detail section taken on the line 24-24 in Fig. 23

Figure 25 is a vertical section, on an enlarged scale, taken on the line 25-25 in Fig. 1;

Figure 26 is a detail section, on an enlarged scale, taken on the line 26--26 in Fig. 25, showing the roller clutch for driving the machine;

Figure 27 is a section through the driving clutch, taken on the line 21-21 in Fig. 26;

Figure 28 is a vertical section, on an enlarged scale, taken on the line 2828 in Fig. 5 showing the bag bottom opening rolls;

Figure 29' is a detail sectional view, on an enlarged scale, showing the gripping and creasing members on the opening rolls;

Figure 30 is a detail sectional view similar to Fig. 29 but showing one of the slitting blades and cooperative groove in the opening rolls;

Figure 31 is a detail section on an enlarged scale, taken on the line 3 l-3l in Fig. 28, showing the roller and a portion of the cam for controlling the gripper of the lower opening roll;

Figure 32 is an elevation, partly in section, of the upper opening roll;

Figure 33 is an elevation of the lower opening roll;

Figure 34 is a detail section taken on the line 3434 in Fig. 32;

Figure 35 is a detail section taken on the line 3535 in Fig. 33;

Figure 36 is a detail section taken on the line 36-36 in Fig. 32;

Figure 3'7 is an elevation, on an enlarged scale, of the bagbottom pasting roll; I

Figure 38 is a detail section on an enlarged scale, taken on the line 38-38 in Fig. 37;

Figure 39 is a detail section on an enlarged scale, taken on the line 39-39 in Fig. 3'7;

Figure 40 is a detail view on an enlarged scale, taken on the line 4040 in Fig. 37;

Figure 41 is an elevation, of one of the creasers;

Figure 42 is a section taken on the line 42-42 in Fig. 41;

Figure 43 is a section taken on the line 43-43 in Fig. 41;

Figure 44 is a detail section taken on the line 44-44 in Fig. 41;

Figure 45 is a detail section taken on the line 4545 in Fig. 41;

Figure 46 is a view in elevation of the cooperate ing creaser;

Figure 4'? is a section taken on the line 41-41 in Fig. 46; r

t Figure 48 is a top plan view of the paste applyling mechanism for the bag bottom pasting ro Figure 49 is a view of a portion of the paper web, showing the manner in which the line of paste for the longitudinal seam and the spots of paste at the ends of the slits are applied thereto;

Figure 49 represents a transverse section through the bag tube, showing the paste spots on the inner surfaces of the upper and lower walls thereof;

Figure 50 is a perspective view of a section of the bag tube formed by folding the web, illustrating the manner in which paste from the paste spots initially applied to the portions of the web which form one side of the tube is applied thereby to the opposite side of the tube;

Figure 51 is a perspective view of one of the bag lengths after it has been creased and silt;

Figure 52 shows one of the bag lengths or sections after the bottom thereof has been opened and pasted;

Figure 53 is a longitudinal section, on an enlarged scale, taken on the line 53-53 in Fig. 52 and Figure 54 is a view similar to Fig. 53 but showing the bottom of the bag in closed condition.

Similar parts are designated by the same reference characters in the different figures.

The bag machine, as shown in the present instance, comprises a frame having a pair of side members I in which the various elements of the machine are mounted, and a stand 2 for supporting a roll of paper A from which the web of paper a is fed into the machine. Referring particularly to Figs. 1 to 4 inclusive, the web passes around a guide roller 5 supported by a bracket 6 attached to the machine frame and operating under the influence of a web tensioning spring 'I, and the web then passes around an idler roller 8 and between a roller 9 and a printing plate l0 which prints a trade-mark or other impression at suitable points on the web. The web then passes around a guide roller II and between a. roller I 2 and a disk l3, the latter applying a continuous line of paste or other adhesive b to the web adjacent to one of its longitudinal edges. The web then passes around a roller [4 at which point it receives at suitable intervals a pair of paste spots 0 from a pair of paste spot applying pads or members l5 and, while passing around the roller l4, slits d which are to form the thumb holes (1' on the mouths of the bags, are formed in the web by the thumb cutter l6. From the roller I4, the web passes beneath a .former II which may begf the kind commonly used in machines of this class and is provided with the usual folders II and I'I for folding the longitudinal edges of the web inwardly to form the web in a tube with the edge of the web bearing the line of paste b underneath so that the tube will be provided with a longitudinal seam. The tube is drawn beneath the folder plates II and from the former by a pair of continuously driven draw rolls I8 and I9, and as it is drawn from the former, it is flattened by a roller I60, thereby bringing the upper side of the tube against the lower side thereof and thus causing transferrance of paste from the spots 0, c on the inner surface of the lower side to the inner surface of the upper side of the tube to provide the paste spots 0, c thereon. The tube then passes between a revolving cutter 20 and a 00- operating cutter member 2I which sever the tube into bag lengths while the tube in advance of the cutter is passing between a pair of pinch rolls 22 and 23. The severed bag length then passes at hit increased.speedbetweeira pair of carrier -rolls;;-24 and 25 and then between avpair of corrugating rolls 26and 21 and then betweenupper and :lower opening rolls '28 and, 29 which openszthelleading ends of the bag sectionsand fold end portions thereof against the paste spots 0, c and c, c, then between the lower opening roll 29 and a coacher roll wand between a pairof pasting rolls 3| and 32 which apply the paste for the securing of the bottom flaps of the bag,f then between a pair of carrier rolls 33 and 34 and between a' pair of creasersx-35 and 35 which operate on the bottom flaps to close, them and complete the bag bottoms, and the completed bags are delivered between the creaser roll 85 and a flap foldingroll onto a belt 31! whichremoves them from the machine.

Referring more particularly to Figs. 2, 6 and 7, the printing plate i8 is carried by an arm 88 which is clamped or otherwise fixed in appropriate position on a shaft 4i journalled in suitable bearings in the side members of the frame, this shaft being driven by a gear 42' fixed thereon and meshing with an idler 83, the latter. meshing with a gear Ml mounted revolubly on a shaft 45 secured.

\ to the achacent'sidemember of the frame by a bolt t5. To the hub 84 of the-gear 44 is secured, bya clampii or other suitable means, an elliptic gear 88 and this gear meshes with a companion elliptic gear 49,-the latter being secured, as by a clamp'5il to a shaft 5!; the latter being mounted in a bearing 52 and having a bevel gear 53 fixed thereon which meshes'with abevel gear 54 fixed on a longitudinal shaft 55,.the shaft 55 being driventhrough a pair of bevel gears 58 from the shaft 51 and the latter being driven through gears 58 and 59 from the main driveshaft 68 (Fig. 25). By employing the elliptic gears 48 and 49 for driving'the arm 48 carrying the printing plate it), said arm will be driven at a variable speed dur-' ing its rotation, and by adjusting the gears 48 and iilinto suitable angular positions about the hub of the gear 44 and the shaft 5| and securing them in such adjusted positions by the clamps 41 and 58, the speed of travel of the printing plate ill at the moment .it engages the travelling web can be adjusted to conform with the speed of the web although the web may travel at different speeds through the machine to conform'with the making of bags of different lengths. The arm 48 carrying the printing plate In makes one revolution corresponding to the passage of each bag length, it printing upon one side of the web while the opposite side of the web is supported by the freely revoluble roller 9' supported by a bracket 9' mounted adjustably in the machine frame. The printing plate) is supplied with ink at each revolution thereof by a roller 62 (Fig. 2) which is supported by an arm 63, the latter being suspended by a pivot 64 from a bracket 85, the latter being supportedfon a cross memberfGS of the frame by a set screw 81 which afiord's means of adjustment of the roller 62 vertically to bring it into the path of the revolving printing plate; The roller82 issupplied with ink from a cooperatingink fountain roller 58 which m'ay contain a supply of ink, The ink fountain roller 88 is mounted on a -shaft 18 whichis driven through thegear ll ,fixed thereonthe gearfli'fixed Oh they shaftttland an -idler: gear I311 f i The longitudinal seam paste 'r'01l s (Fi s- 2 and '8 to 11 inclusive), is fixed on a'shaft' 13",v jouraanea in bearings as? onapastejdishtiifthis roll revolving idly y frictionalcontact,witlithe; margin'ofi'the paper asit, passes between this 7 1 r011 and'the cooperating r011 l2. Thepaste dish' 69,-into which the roll-J3 dips to; receivepaste therefrom isprovided.with aepair of wipers I4, between which'theperi-pheral portion of the roll 13. passes :whereby excess paste will ,be. removed. therefrom,-and the paste dish is mounted ona base which is provided onits underside with a rib or; key I6 which rests in and'nis movable longitudinally in a keyway Tl formed in the upper sideof a supporting shaft 18, the latter being mounted in bearings 18 in the sideframe memhers I, the shaft l8 being slidable axially and also rotatable in said bearings. -The base 15, which may be adjusted longitudinally along the shaft 18 to accommodate it to webs of different widths for bags of different sizes, is clamped in adjusted position onsaid shaft by a clamping member 88 one end of which engages the underside of the shaft 18 and the other end of which bears on a fulcrum lug 8| depending from the base, a screw 82 being provided for clamping the base 15 rigidly on the shaft 18. -A fine adjustment of the paste roll l3.with respect to the marginal edge of the web is provided by a screw 83 which is threaded in the adjacent side frame member I and extends through a slot 84 in an arm 85, the latter being clamped or otherwise fixed to the outer end of the shaft 18, the screw having thrust collars 86 thereon'which bear against the opposite sides of=the arm 85 so that rotation of the screw in one or the other direction will shift the shaft 18 longitudinally and thereby adjust the paste roll i3 toward or from the longitudinal edge of the web. The present invention provides means whereby the paste roll 13 may be easily and quickly thrown out of operative position with respect to the web, such means comprising a cam 81 mounted-on a shaft 88, the latter being mounted rotatably in a bearing 89 on the adjacent side frame member i, this cam having a squared or other angular portion 98 thereon to receive a crank or wrench 9| for rotating it, and the arm 85 fixed to the shaft II has an extension 92 which rests by gravity on the upper side of the cam. When the cam is swung into the position shown in Fig. 10, the paste dish 59 and paste roll 4 l3 'will occupy operative relation with the web passing around the roller l2 and the roll l3 will apply a line of pastefor the longitudinal seam. However, should it be desired to throw the paste roll l3 out of operation, as when it becomes nec- 1 the arm 85 and thereby'rotate the shaft 18 in a direction to swing the paste roll l3 away from the cooperating rollerl2 and out of contact with the web. 5

' ithe web passes around the roller l4 it receives two spotsof paste c, c (Fig. 49) on both portions of the web which will lie substantially at theterminals of {the slits c (Fig. 51) w hich are subsequently made "in the bag tube as a part of thebottom forming operation. These spots of paste' areappliedtogthe web by a pair of paste pads fl,5f(Figs,2,,13, "14 and 15). These paste pads are carried 'on a pair of arms 95 which are clamped for otherwise 'adjustably fixed to a shaft that it make's one revolution during the passage 7 or each portion of, e web corresponding to a 

